MSL: Support layered input attachments.

These need to use arrayed texture types, or Metal will complain when
binding the resource. The target layer is addressed relative to the
Layer output by the vertex pipeline, or to the ViewIndex if in a
multiview pipeline. Unlike with the s/t coordinates, Vulkan does not
forbid non-zero layer coordinates here, though this cannot be expressed
in Vulkan GLSL.

Supporting 3D textures will require additional work. Part of the problem
is that Metal does not allow texture views to subset a 3D texture, so we
need some way to pass the base depth to the shader.

1 files changed, 2 insertions, 0 deletions

diff --git a/test_shaders.py b/test_shaders.py
index 71e9361f..4b8a52fa 100755
--- a/test_shaders.py
+++ b/test_shaders.py
@@ -298,6 +298,8 @@ def cross_compile_msl(shader, spirv, opt, iterations, paths):
     if '.fixed-sample-mask.' in shader:
         msl_args.append('--msl-additional-fixed-sample-mask')
         msl_args.append('0x00000022')
+    if '.arrayed-subpass.' in shader:
+        msl_args.append('--msl-arrayed-subpass-input')
 
     subprocess.check_call(msl_args)